Note the following:

• The super method call invokes the no-arg constructor of java.rmi.server.UnicastRemoteObject, which "exports" the remote object by listening for incoming calls to the remote object on an anonymous port.

• The constructor must throw java.rmi.RemoteException, because RMI's attempt to export a remote object during construction might fail if communication resources are not available.

Although the call to the super no-arg constructor occurs by default if omitted, it is included in this example to make clear the fact that Java constructs the superclass before the class.